You were Shadow's girlfriend, and it was new years eve. Sonic had invited you guys to his party to celebrate the new year, and you two went and chatted in the corner together.

it started to get too loud, so you two stepped outside onto the grass and looked up at the stars. At exactly 12, the fireworks went off and shadow turned to you and smiled. His usual cold and stoic expression and tone was changed when he was with you. "Happy new year love~" he said before kissing you gently.